Objective: The purpose of this study was to evaluate effects of goat milk and fermented goat milk on reproductive function and stamina of male rodent. Methods: Experiment I: Male ICR mouse was divided into four groups. Group 1 none-treated control; Group 2 received saline; Group 3 received cow milk 10 ml/kg per day for 15 days; Group 4 received goat milk 10 ml/kg per day for 15 days. The cauda epididymal sperm motility and testicular sperm production were investigated. Experiment II: Male SD rat was divided into three groups. Group 1 received saline; Group 2 received goat milk 10 ml/kg per day for 28 days; Group 3 received fermented goat milk 10 ml/kg per day for 28 days. The cauda epididymal sperm motility and testicular sperm production were also investigated. The concentration of testosterone in serum at 1 and 3 weeks after treatment was determined using Immulite 2000 kit. Testes, epididymis, prostate, and seminal vesicle were weighed. Experiment III: Male ICR mouse was divided into four groups. Group 1 none-treated control; Group 2 received saline; Group 3 received goat milk 10 ml/kg per day for 4 weeks; Group 4 received fermented goat milk 10 ml/kg per day for 4 weeks. After treatment, the mouse was forced to swim to test for stamina. Results: In Experiment I, the cauda epididymal sperm motility after in vitro culture for 1 or 3 h was significantly (p<0.05) higher in cow milk and goat milk than in the control and saline. There was no significant difference in the cauda epidymal sperm motility between cow and goat milk. The testicular spermatid number was significantly (p<0.01) higher in goat milk (222.8${\times}10^6$) than in the control (108.6), saline (98.2), and cow milk (118.2). In Experiment II, the cauda epididymal sperm motility after in vitro culture for 1 h was significantly (p<0.05) higher in fermented goat milk than in saline and goat milk. There was no significant difference in the cauda epidymal sperm motility between saline and goat milk but goat milk showed slightly higher sperm motility than saline. After in vitro culture for 3 h, the cauda epididymal sperm motility was significantly (p<0.01) higher in fermented goat milk and goat milk than in saline. The testicular spermatid number was significantly (p<0.05) higher in goat milk than in saline, and significantly (p<0.01) higher in fermented goat milk than in saline. And the serum testosterone levels of rats administered with goat milk or fermented goat milk were increased but were no significant difference among three groups. Also the prostate weight was significantly (p<0.05) increased in the goat and fermented goat milk. In Experiment III, the swimming time in the goat milk and fermented goat milk groups was significantly (p<0.01) longer than in the control and saline. There was no significant difference in the swimming time between goat and fermented goat milk but the fermented goat milk showed slightly longer swimming time than the goat milk. Conclusion: The cauda epididymal sperm motility, the testicular spermatid number and stamina were improved when the mice and rats were drunk with goat milk or fermented goat milk.
Supriyati, Supriyati;Budiarsana, I. Gusti Made;Praharani, Lisa;Krisnan, Rantan;Sutama, I. Ktut
Journal of Animal Science and Technology
/
제58권8호
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pp.30.1-30.12
/
2016
Background: The effect of choline chloride supplementation through forced drinking combined with concentrate diets containing Ca-fish oil on milk production and milk composition of Etawah Grade goats was evaluated. Choline chloride is an essential component in ruminant diets as it is required for fat metabolism. Method: The experiment was conducted in a completely randomized block design with three types of treatments and eight replications. The trial had two successive experimental periods; the first, during the eight weeks of late pregnancy, and the second, during the first 12 weeks of lactation. Twenty-four Etawah Grade does in the second gestation period were divided into three treatment groups. Commercial choline chloride 60 % in corncobs-based powder was used as a source of choline chloride. The treatments were no supplementation (control) and supplemented with either 4 g or 8 g/2days of choline chloride. Choline chloride was given to the animals through a forced drinking technique, after dissolving it in 60 ml drinking water. The initial body weight of does was $38.81{\pm}3.66kg$. The does were penned individually, and were given fresh chopped King Grass ad libitum and 700 g/day of concentrate diets containing Ca-fish oil, starting eight weeks prior to expecting kidding and continuing for 12 weeks of parturition. Results: All nutrient intakes were not significantly different (p > 0.05) among the treatments during the late pregnancy and the lactation periods. Supplementation did not affect (p > 0.05) the average daily gains and feed conversion ratio during pregnancy but gave effects (p < 0.05) on the average daily gains, feed conversion ratio and income over feed cost during lactation. The highest average daily milk yields and 4 % fat corrected milk yields were found in goats supplemented with 4 g/2days of choline chloride and increased by 17.00 % and 24.67 %, respectively, compared to the control. Moreover, milk composition percentage and milk constituent yields improved significantly (p < 0.05) in those supplemented with 4 g/2days of choline chloride. Conclusion: The supplementation of 4 g/2days of choline chloride through forced drinking increased milk yields, the 4 % fat corrected milk yields, milk composition, milk constituent yields, and improved feed conversion ratio and income over feed cost of Etawah Grade goats.
Test-day records (n=13677) sampled from 896 ewes in 5-9 (${\mu}$=7.5) monthly test-days were used to estimate genetic and phenotypic parameters of test-day yields, lactation milk yield (TMY), length of the milking period (DAYS) and three measures of persistency of milk yield in Boutsico dairy sheep. Τhe measures of persistency were the slope of the regression line (${\beta}$), the coefficient of variation (CV) of the test-day milk yields and the maximum to average daily milk yield ratio (MA). The estimates of variance components were obtained under a linear mixed model by restricted maximum likelihood. The heritability of test-day yields ranged from 0.15 to 0.24. DAYS were found to be heritable ($h^2$=0.11). Heritability estimates of ${\beta}$, CV and MA were 0.15, 0.13, 0.10, respectively. Selection for maximum lactation yields is expected to result in prolonged milking periods, high rates of decline of yields after peak production, variable test-day yields and higher litter sizes. Selection for flatter lactation curves would reduce lactation yields, increase slightly the length of the milking period and decrease yield variation as well as litter size. The most accurate prediction of TMY was obtained with a linear regression model with the first five test-day records.
To find out the effect of oxytocin on somatic cell count and milk production, 12 primiparous and multiparous Murrah buffaloes were selected, immediately after the parturition, from the Institute's buffalo herd. These were divided into two groups of 6 each. Buffaloes of group I did not receive oxytocin injection (control); whereas, buffaloes of group II were administered oxytocin during early lactation (av. 42.50 days). The oxytocin injection was given in doses of 2.5 IU i.m. before the start of milking, to let down the milk, for a period of 5 days. Samples of milk from individual buffaloes were collected for 5 days before (Period I), during (Period II) and after (Period III) from both the group of buffaloes. Milk samples of A. M. and P. M. milking were composited in proposition to milk yields for analysis of milk constituents. Normal values of somatic cell counts in group I of buffaloes varied from 0.54 to $0.75{\times}10^{5}cells/ml$. Mean cytoplasmic particles and epithelial cells varied from 3.68 to $7.19{\times}10^{5}cells/ml$ and 0.13 to $0.54{\times}10^{5}cells/ml$. On percentage basis the epithelial and the total leucocyte count were 60 and 40. Total leucocyte count, in the study varied from 0.17 to $0.69{\times}10^{5}cells/ml$. The differential cell count of milk indicated presence of lymphocytes (16.50 to $61.16{\times}1000$), neutrophil (0.00 to $2.00{\times}1000$) and monocyte (0.00 to $18.16{\times}1000$). Somatic cell count (p<0.01) and epithelial cells (p<0.05) varied between buffaloes and between periods of study. Total leucocyte counts of milk were also significantly varied between periods (p<0.05). The change in fat, lactose, chloride, EC and NEFA concentrations during different periods of study, were highly significant, indicated diurnal variations in different buffaloes during different days of experiment. Administration of oxytocin resulted in increase in somatic cell counts of milk (p<0.01) due to the increases in total leucocyte count (p<0.01) during the treatment period. The differential cell count indicated that oxytocin administration increased lymphocyte number significantly (p<0.01). However, secretion of neutrophil, monocyte and cytoplasmic particles were not affected by oxytocin. Eosinophil and basophil cell, though present in few samples, remain unaffected by oxytocin administration. There was no effect of oxytocin on milk production, composition, pH, EC and NEFA concentration.
Objective: The aim of our study was to determine the associations of heifer reproductive performance with survival up to the first calving, first-lactation milk yield, and the probability of being culled within 50 days after first calving. Methods: Data from 33 large Holstein-Friesian commercial dairy herds were gathered from the official milk recording database in Hungary. The data of heifers first inseminated between January 1, 2011 and December 31, 2014 were analyzed retrospectively, using Cox proportional hazards models, competing risks models, multivariate linear and logistic mixed-effects models. Results: Heifers (n = 35,128) with younger age at conception were more likely to remain in the herd until calving, and each additional month in age at conception increased culling risk by 5.1%. Season of birth was related to first-lactation milk yield (MY1; n = 19,931), with cows born in autumn having the highest milk production (p<0.001). The highest MY1 was achieved by heifers that first calved between 22.00 and 25.99 months of age. Heifers that calved in autumn had the highest MY1, whereas calving in summer was related to the lowest milk production (p<0.001). The risk of culling within 50 days in milk in first lactation (n = 21,225) increased along with first calving age, e.g. heifers that first calved after 30 months of age were 5.52-times more likely to be culled compared to heifers that calved before 22 months of age (p<0.001). Calving difficulty was related to higher culling risk in early lactation (p<0.001). Heifers that required caesarean section were 24.01-times more likely to leave the herd within 50 days after first calving compared to heifers that needed no assistance (p<0.001). Conclusion: Reproductive performance of replacement heifers is closely linked to longevity and milk production in dairy herds.
The study was carried out to find out the changes of hormone levels in blood serum and milk of Holstein cows during the estrous cycle. The progesterone, estradiol-$17{\beta}$ from the blood serum and milk samples were assayed by radioimmunoassay methods. The results of this study were summarized as follows; 1. The progesterone levels in blood serum during the estrous cycles began to decline rapidly at 2 days before estrus, decreased to $0.27{\pm}0.18ng/ml$ at on the day of estrus, and reached a peak mean level of $3.33{\pm}0.47ng/ml$ at 15 days after estrus. 2. The progesterone levels in milk during the estrous cycles began to decline rapidly at 2 days before estrus, decreased to $0.80{\pm}0.18ng/ml$ on the day of estrus, and increased a peak mean level of $3.80{\pm}0.36ng/ml$ at 15 days after estrus. 3. The estradiol-$17{\beta}$ levels in blood serum during the estrous cycles showed a peak mean level of $9.79{\pm}1.72pg/ml$ on the day of estrus, and decreased from $4.79{\pm}1.82pg/ml$ to $5.73{\pm}0.96pg/ml$ at luteal phase. 4. The estradiol-$17{\beta}$ levels in milk during the estrous cycles showed a peak mean level of $36.80{\pm}2.04pg/ml$ on the day of estrus, and decreased from $18.93{\pm}0.84pg/ml$ to $19.50{\pm}1.12pg/ml$ at luteal phase. 5. During 20 to 25 days after artificial insemination, the accuracy of pregnancy diagnosis from the blood serum progesterone levels were 87.5% for non pregnant cows (<2.0ng/ml), and 83.3% for pregnant cows ($${\geq_-}$$3.0 ng/ml). The accuracy of pregnancy diagnosis from the milk progesterone levels were 75.0% for non-pregnant cows (<2.4 ng/ml), and 94.4% for pregnant cows ($${\geq_-}$$3.2 ng/ml).
The study was undertaken to investigate the validity of milk urea concentration as an index of the reproductive performances in crossbred Karan-Fries (Holstein Friesian${\times}$Tharparkar) cows under farm condition. Milk urea was analysed in noon milk samples (1200 to 1300 h) to interrelate with the interval from parturition to first service, number of insemination per conception, first service conception rate and service period. Milk progesterone (P4) was analysed in noon milk samples on the day 1, 10, 20 and 30 post insemination to study the effect of milk urea concentration on early embryonic mortality. The interval from parturition to first service was found significantly (p<0.01) higher ($77.2{\pm}5.5$ days) when milk urea concentration was ${\geq}63.4mg/dl$. The average milk urea concentrations (mg/dl) were found $42.1{\pm}2.5$, $47.9{\pm}1.5$ and $50.3{\pm}3.1$, respectively in cows that conceived at $1^{st}$, $2^{nd}$ and $3^{rd}$ insemination. However, the variation was not statistically significant. The first insemination conception rate was found significantly (p<0.05) higher (68.8%) when milk urea level was ${\leq}32.4mg/dl$. The service period was found significantly (p<0.05) higher ($125.4{\pm}8.8$ days) when milk urea concentration was ${\geq}45.1mg/dl$. The milk P4 level indicated that the cows, those were detected as non-pregnant on day 60 post insemination were initially pregnant but the pregnancy was terminated sometime during the day 30 to 60 post insemination. The study indicates that the milk urea values may be used as an index of reproductive performances in dairy herd when individual animals are not being monitored for nutritional status. The altered milk urea values may be utilised by the farmers as ready reference to rectify the protein and energy nutrition in cows to achieve the better reproductive performances in herd.
In this study, the fatty acid content and quality characteristics of the massless enegy treated commercial milk products stored at $30^{\circ}C$ were investigated. The pH of pasteurized milk decreased significantly. UHT milk showed also significant decrease in pH to 4.70~5.72 on the 8th day of storage which was higher than control even there was no significant differences. The acidity of pasteurized milk decreased significantly from the 2nd day of storage to 0.13~0.65% in treatments and control and control was 0.94% at the 8th day of storage and 0.35% in the treatment of ultra high temperature milk. The solid content of pasteurized milk was $7.5^{\circ}Bx$ at 1 day after storage, which showed significant differences from the $11.2^{\circ}Bx$ in the treatment. Pasteurized milk showed more bacterial growth in the treatment than in the control. After 4 days of storage, there was no bacterial count in pasteurized milk but it increased significantly $1.9{\times}10^8$ and $4.5{\times}10^6$ each in UHT milk. Lactic acid bacteria were detected in the curd $2.0{\times}10^6$ in the control and $2.0{\times}10^8$ in the treatment at the 4th day. Palmitic acid content in the saturated fatty acid was the highest at 35.4~41.4% in both pasteurized and ultra high temperature milk. In the UHT milk, linolenic acid was significantly increased to 3.8% in the treatment compared with 2.9% in the control at the 4th day of storage. Therefore, commercial ultra high temperature milk with physical treatment to increase beneficial bacteria showed significant difference compared to the control after 5 days of storage in this experiment.
Data on 1,037 Nili-Ravi buffaloes from four institutional herds were used to study lifetime milk yield, herd life, productive life and breeding efficiency. A general linear model was used to study the environmental effects while an animal model having herd, year of birth and age at first calving (as covariate) along with random animal effect was used to estimate breeding values. The lifetime milk yield, herd life, productive life and breeding efficiency averaged $7,723{\pm}164$ kg, $3,990{\pm}41$ days, $1,061{\pm}19$ days and 64 percent, respectively. All the traits were significantly (p<0.01) affected by the year of birth and herd of calving, while the herd life was also affected (p<0.01) by the age at first calving. The heritabilities for lifetime milk yield, herd life, productive life and breeding efficiency were $0.093{\pm}0.056$, $0.001{\pm}0.055$, $0.144{\pm}0.079$ and 0.001, respectively. The definition for productive life, where each lactation gets credit upto 10 months had slightly better heritability and may be preferred over the definition where no limit is placed on lactation length. The genetic correlation between productive life and lifetime milk yield was low but high between productive life and herd life. The selection for productive life will increase herd life while lifetime milk yield will also improve. The overall phenotypic trend during the period under the study was negative for lifetime milk yield (-280 kg/year), herd life (-93 days), productive life (-42 days/year) and breeding efficiency (-0.36 percent/year), whereas the genetic trend was positive for lifetime milk yield (+15 kg/year) and productive life (+4 days/year).
In order to investigate the longitudinal changes on zinc secretion of lactating women and zinc intake of breast-fed infants, we examined 20 lactating women(10 primipare and 10 multipare) and their infants during the first 90 days postpartum. We measured the consumed volume of human milk by test-weighing method and zinc concentration by atomic absorption spectophotometry after wet digestion. Weight gain of infants was -5.7, 54.1, 46.3, 42.0 and 32.3g/day at 7, 15, 30, 60 and 90 days postpartum, respectively. The secretion volume of human milk was 527, 608, 724, 841 and 798g/day respectively. The consumed volume of human milk of breast-fed infants was 432, 503, 603, 715 and 715g/day. The intake level of breast milk to secretion volume reached 85.0% in average. The zinc concentration of the milk was 4.29, 3.32, 2.52, 1.62 and 1.18mg/l, and the zinc intake of breast-fed infants was 1.80, 1.69, 1.45, 1.15 and 0.70mg/day. Zine intake per body weight of infants averaged 0.32mg/kg/day during the first 90 days postpartum. The average zinc intake of breast-fed infants was 1.36mg/day, which is 27.2% of the recommended daily allowance for 0-4-month-old infants.
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